Zhipu releases GLM-5.3: top open-source coding model, cybersecurity skills emerge from post-training
Zhipu released GLM-5.3 today. Same base model as 5.2, but post-training pushed coding to #1 among open-source models: Terminal-Bench 3.0 jumped from 4.6 to 28.3, DeepSWE v1.1 from 46.2 to 66.9. The model also showed emergent vulnerability-finding skills—white-box code review hit 84.5%, slightly above Mythos 5's 83.8%, though exploit tasks still lag. Red-teaming uncovered 2,436 bugs, 1,097 medium/high severity, some ~45 years old. Weights open-source in two weeks after safety hardening; a free security-audit program for open-source projects launches alongside. I'd temper expectations: the exploit gap vs. Mythos 5 is real—don't read this as an all-purpose offensive model.
Why it matters: Zhipu drops GLM-5.3 — same base model, but post-training alone pushes coding to #1 open-source, with Terminal-Bench jumping from 4.6 to 28.3 and emergent white-box code review capability. Weights open-source in two weeks, a direct signal for devs. Slight ding: no false-negativ...